/**
 * Structural diff of the generated `.pikku` meta between two points in time —
 * used by `pikku all --diff` to report what a codegen run added/removed/changed
 * (functions, wirings, workflows, emails, …). The snapshot is a plain in-memory
 * copy of the meta files, so diffing is a couple of small JSON reads, not a
 * second inspection pass. Only user-visible buildable surfaces are included;
 * plumbing (secrets/variables/middleware/permissions) is intentionally omitted.
 */
export type MetaDiffCategoryName = 'functions' | 'http' | 'workflow' | 'email' | 'scheduler' | 'queue' | 'channel' | 'trigger' | 'mcp' | 'agent';
export interface MetaDiffEntry {
    id: string;
    status: 'added' | 'removed' | 'modified';
}
export interface MetaDiffCategory {
    added: number;
    removed: number;
    modified: number;
    entries: MetaDiffEntry[];
}
export interface MetaDiff {
    totals: {
        added: number;
        removed: number;
        modified: number;
    };
    categories: Partial<Record<MetaDiffCategoryName, MetaDiffCategory>>;
}
export type MetaSnapshot = Partial<Record<MetaDiffCategoryName, Record<string, unknown>>>;
/** Read the current meta from disk into an in-memory snapshot. */
export declare function readMetaSnapshot(outDir: string): MetaSnapshot;
/** Diff two snapshots; only changed ids and non-empty categories are returned. */
export declare function computeMetaDiff(before: MetaSnapshot, after: MetaSnapshot): MetaDiff;